CONSTRUCTION MANAGEMENT PRESENTATION - GPF Construction... · CONSTRUCTION MANAGEMENT PRESENTATION...
Transcript of CONSTRUCTION MANAGEMENT PRESENTATION - GPF Construction... · CONSTRUCTION MANAGEMENT PRESENTATION...
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CONSTRUCTION MANAGEMENTPRESENTATION
PRESENTED BY: BAKANG [email protected]
TLHAMATSI AFRICA PROJECTS
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CONSTRUCTION MANAGEMENT - DEFINED
Act of managing the construction process
• Contractual arrangement
• Construction management personnel canrepresent owner or contractor
• Construction Manager manages the basicresources of construction
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CONSTRUCTION MANAGEMENT - DEFINEDSUCCESSFUL PROJECT = RIGHT PEOPLE
§ DESIGN PHASE§ PROJECT MANAGER§ QUANTITY SURVEYOR§ ARCHITECT§ STRUCTURAL/CIVIL ENG§ ELECTRICAL ENG§ MECHANICAL ENG§ WET SERVICES ENG§ FIRE ENGINEER§ TRAFFIC ENG§ TOWN PLANNER
§ CONSTRUCTION PHASE§ MAIN CONTRACTORSUB-CONTRACTORS:§ ELECTRICAL§ PLUMBING§ BRICKWORK§ PAINTING/TILING - FINISHES§ ROOFING§ CIVILS / PAVING§ CABINETRY§ HEALTH & SAFETY
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BASIC RESOURCES REQUIRED
§ Workforce
§ Subcontractors
§ Equipment
§ Construction Plant
§ Materials
§ Information
§ Time
§ Money
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PROJECT MANAGEMENT
§ Optimize the three attributes of: quality,cost, and time;
§ Principle objective of a constructionmanager is to complete each projecton time and within budget, whilemaintaining acceptable levels of qualitysafety and risk.
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METHOD/SYSTEM OF PROJECT DELIVERY
§ Traditional design-bid-build
§ Phased or Fast-track
§ Design-build
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METHOD/SYSTEM OF PROJECT DELIVERY
Design Phase Construction phaseTender
Traditional Design-Bid-Build
Design Phase
Construction phase
Phased or Fast-Track Construction
Time Savings
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LEGAL CONTRACT
JBCC Docs = The Joint Building ContractsCommittee
§ PRINCIPAL BUILDING AGREEMENT
§ MINOR WORKS AGREEMENT
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APPOINTING A CONTRACTORMethod of Award
1. Competitive bidding– formally advertised public work
– selective invitation for private work
– awarding of contracts by:• Lowest responsible bid or• Best value i.e.: technical score ¸ price or
price + time(ft), and other variations
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Method of Award2. Negotiated contracts
– Generally private work
– Benefits include flexibility of pricingarrangement
– Often used on projects of large size and greatcomplexity
– Owner may value expertise and integrity of aparticular contractor and can award contractwithout competition that may otherwiseexclude that contractor from the work
APPOINTING A CONTRACTOR
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Method of Pricing• Fixed-price
1. Lump sum• Traditional, single fixed price• Predetermined price that includes profit,
overhead, and all other costs• Greatest risk to contractor resulting in a
higher markup (the greater the risk, thehigher required rate of return )
• Most common contract form
APPOINTING A CONTRACTOR
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Method of Pricing• Fixed-price
2. Unit-price contract• Prices of specified units of work are fixed
or predetermined• Actual cost to the owner will vary with
actual quantities placed• Best used when details and general
character of the work are known, butquantities are subject to variation
• Risk of unbalanced bids
APPOINTING A CONTRACTOR
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CONSTRUCTION CONTRACTS
Prequalification of bidders;
• Evidence of satisfactory previous experience• Financial stability
• Advanced or specialized prequalification maybe
required as dictated by the magnitude andnature of the work
• Insurances / guarantees
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ELEMENTS OF A LEGAL CONTRACT
• offer• acceptance• consideration• legal in every respect• requires a meeting of the minds• offer + acceptance = binding obligation
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CONSTRUCTION TENDER PROCESS
• Advertisement for Tenders• Information for bidders• Bid/Tender form• General notices• Notice of award• Notice to proceed• Insurance
• Payment bond• Contract form or
agreement• General conditions or
provisions• Supplemental and/or
special conditions• Plans• Specifications
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CHARACTERISTICS OF A “GOOD” CONTRACTDOCUMENT
1. Carefully considered2. Expressed clearly3. Time-tested4. Comprehensive5. Fair6. Balanced7. Applicable to the elements of a construction
projects
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CONSTRUCTION CONTRACTS
Tenderers/bidders are required to:
• examine all portions of the contract documents
• examine the physical conditions of the site
• determine legal requirements affecting the work
• complete these investigations prior to bidding
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CONSTRUCTION CONTRACTS
Contract documents should:
• Include a hierarchy to determine whichdocuments govern in case of conflict.
• Not contain ambiguous language
• Not contain exculpatory (escape) clauses
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CONSTRUCTION CONTRACTS – GENERALCONDITIONS
• Contractor’s warranties• Defective drawings• Approval of contractor’s plans
and equipment• Approval of shop drawings
other submittals• Guarantee by the Contractor• Conduct of the work• Defective work• Relations with other
contractors andsubcontractors
• Inspection of materials• Inspection of field work• Authority of the Eng’r.• Duties of the QA• Permits and licenses• Labour considerations• Work done by the owner• Lines and grades• Order and discipline• Performance• Final inspection &
acceptance
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SUBMITTALS REQUIRED IN THE CONTRACT
• copies of subcontracts• shop drawings and support calculations• catalogue cutsheets• material or equipment samples• schedule(s)• certificates of insurance• environmental test reports (where required)• material test reports & certifications
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SHOP DRAWINGS
• structural steel details & erection plan• erection procedures (safety)• shoring & scaffolding• concrete formwork design and details• construction sequencing diagrams• pipe and ductwork fabrication details• reinforcing steel bending diagrams and bar lists• structural timber elements• ornamental iron or steel
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CHANGES IN SPECIFICATIONS AND PLANS
• clarification, correction, modifications prior totender/bid are referred to as an “addendum”
• Owner/PM must maintain a system ofdistributing and acknowledging receipt ofaddendum
• plan and spec changes after award are referredto as “revisions”. (i.e. Drawing & Site instruction)
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CONSTRUCTION PLAN - SUMMARY
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CONSTRUCTION PROGRAMME - DETAILED
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CONSTRUCTION PROGRAMME -INFORMATION
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CONSTRUCTION PROGRAMME -APPOINTMENTS
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CONSTRUCTION PROGRAMME –REPORTING/ACTUAL
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CLAIMS
• delay or disruption claim• extra work claim• acceleration• impossibility-of-performance claim• defective design claim (error or omission)• interference claim• Inclimate weather (i.e rain days)
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CLAIMS AVOIDANCE
• Claims avoidance begins in the pre-constructionphase
• Contract documents need to be clear, accurate,comprehensive, and fairly distribute risk
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CLAIMS AVOIDANCE
• producing comprehensive, accurate, contractdocuments
• constructability / ‘buildability’ review• clear understanding of contract requirements prior
to tendering/bidding• having good administrative procedures in place• open and honest communication• timely troubleshooting
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DISPUTE RESOLUTIONS• Early settlement between parties
• Alternative depute resolution negotiation• Arbitration (1 or 3 members)• Mediation – neutral advisors• Dispute Review Board
3 or more odd number of board membersselected evenly by both sides
• Litigationsometimes unavoidable; usually undesirable;but sometimes best method
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ABILITY TO INFLUENCE COST OVER TIME
• Greatest potential to influence cost is during thepre-construction design phase
• Claims avoidance begins during pre-construction• Design phase – Value engineering
• Intensive preparation and review of contract
documents
• Careful consideration of methods and
equipment = consider overall constructability
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100%
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Ability to Influence Construction Costs over Time
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Oper.Concept &Feasibility
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Ability to Influence Costs
Construction Cost
ABILITY TO INFLUENCE COST OVER TIME
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DESIGN PROFESSIONALS
• Specify locally available material• Allow substitution (equivalent) of equal quality
material• Avoid one-of–a-kind or non-standard/ custom
items where possibly• Design structures with as many redundant elements
as possible• Design should allow construction using the
prevailing methods and equipment
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• Design to minimize required labour
• Specify a quality of workmanship consistent withthe quality of the project
• Do not require the contractor to assumeresponsibility for information that should befurnished by the design engineer/architect
• Produce simple, straight-forward specs = clearlystate what is expected
DESIGN PROFESSIONALS
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QUESTIONS?